Dual-microphone noise suppression method and system

A dual-microphone, noise suppression technology, applied in speech analysis, instruments, etc., can solve problems such as the problem of inability to effectively improve mucus, and achieve the effect of improving clarity and subjective experience

Active Publication Date: 2019-01-04
MORNINGCORE HLDG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the traditional solution cannot effectively improve the muffled sound problem

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  • Dual-microphone noise suppression method and system
  • Dual-microphone noise suppression method and system
  • Dual-microphone noise suppression method and system

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Embodiment Construction

[0071] The dual-microphone noise suppression method and system proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0072] An embodiment of the present application provides a dual-microphone noise suppression method, the dual-microphone noise suppression method comprising:

[0073] Get two microphone signals;

[0074] Perform the following operations on the two microphone signals: perform time-domain beamforming to obtain the signal y(t); and perform delay addition to obtain the signal y 1 (t);

[0075] For signal y(t) and signal y 1 (t) use the same noise ...

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Abstract

The invention provides a double-microphone noise inhibiting method and system, and in particular relates to connection of the time-domain beam forming method and the frequency domain after-processing method. The method is that one delay-and-sum is added and treated as an assistant signal; whether to select the original path or add a new path is determined according to a voice activating detector. With the adoption of the method, that the large steady noise (fuzzy voice) included in voice cannot be treated in the traditional method can be avoided, the voice articulation and subjective feeling of the improved voice can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a dual-microphone noise suppression method and system. Background technique [0002] Time-Domain Beam-forming (TDBF) dual-microphone noise suppression algorithm is a common method for terminal dual-microphone noise suppression. For details, please refer to the general flow chart figure 1 . like figure 1 As shown, two microphone signals are combined into one signal by beamforming, and then the frequency domain post-processing is performed on the beamformed signal. [0003] Most of the time-domain beamforming algorithms (such as generalized sidelobe canceller, etc.) can effectively eliminate the noise when there is no target near-end speech, but the noise mixed with the target near-end speech is not processed well enough (it tends to protect all signals). In closed moving scenes, such as common buses and subways, the diffuse steady-state noise is very large. After...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0224G10L21/0232
Inventor 谢单辉许云峰王彦
Owner MORNINGCORE HLDG CO LTD
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